Laserfiche WebLink
Impacts of )•lcchmticnl Equipment at Licnson limthers Quarry on Nearby Rock Hluft's <br />Site-sprcitic constant., A' and m, ran he determined by perli)In)ing a regression analysis of <br />nudtiple peak particle velocity (I'PV) and distance (l)) data pairs. In simple terns, rite any given <br />sac, A~ is a n)easure of how much vihr.+tiun energy is transferred to the ground :+[ the energy <br />,nacre and m, the slope of the curvy delinrs how fast the energy attenuates kith distance. <br />3.11 GROI'VD ~10T10NS CAUSED lit OPER:~'fING QU:1RR1' ~t:*.CHINF:I2Y <br />IAtta Irnm tl)c cyuipmcnt vibration study and resulting attenuation curves in the firm) of hyuation <br />L3, drnccd uang regression runt luting tcrhnuptcs, arc shnt~n ut Ptgurr •l. <br />Brarrean Qary Mad>'a>ics~ 6grtprrae NYrdion Q+vec <br />u uc><~ <br />(3ur/t'r 95% /'Y7~ - 11.0141 U ° ~~~ <br />2 • Wyv F4V <br />~' ~ a1~ ~ • Fxn~+~v PPJ <br />IS( ~ • Otw PPV <br />° <br />aomo <br />t o too Im a +om o <br />t~,mm Oq <br />I iFun• J \'tbr.wun I)at,t erd :\ni•nu.th„n l urvc> tilt l)u,trry ! yuynncnt at tlx• :\ushn, t t I l ktarr~ <br />Based nn the scaled site map in Figure I, the distance between the operating crusher and the <br />,trop Rulhns sandstone bluffs is 90(1 fart or greater. At this distance, the peak intensity of ground <br />motion caused by an operating crusher would he around (l.IN144 in/s (0.0141 (9001 ,~ "°~. Islastic <br />motion of this level is undetcctahle and would have nu impact un the stabilny of any rock or sort <br />slopes, <br />l'he intenstty of ground nxttions caused by dozen and rxr.+vaUtn operating witlun X411 feet of <br />the steep sandstone hluR' would resp+xtivcly he 0.(N8 and 0.0118 infs. hue the highest mutton ul' <br />0.(14}t in/s, which is h:uely dehetahle to hum:ms, the clastic ground displaccmrn occurring at the <br />lowest nmasurrd I}cyurncy of IS Ilz would he around 0.000508 inches ~Il.(W8 r (2 n I~) <br />liyualion I . I ~, which is more than I i umes Iess than the thickness of human hair (O.1N18 in). <br />Maximum parirlr accdcr:+tion would be around 4.5 lots' [0.1)•18 x (2 >< IS), Equation 1.2~ which <br />equals 0.O l2 g's. <br />fur terms of comparison, the seismic design criteria fix the stability of rock and earth-tilled dam <br />structures typically specify structures must survive a O.IBg ranhyuakr event that might (xcur in <br />RIiVEY Associates, Inc. Page 5 0(7 Fchruary 21106 <br />